bnp-b2365(eng)b.pdf - 第331页

6. Troubleshooting 6 - 26 Alarm No. 50 Overload 1 The overload detection level reached 100% or more. T he motor or d rive unit is in the overload state. Investigation det ails In vestigation results Remedies SV SP The st…

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6. Troubleshooting
6 - 25
Alarm No.
46
Motor overheat
The temperature protection function in the motor or detector activated.
Investigation details Investigation results Remedies SV SP
The alarm occurs before operation. Investigate item 2. 1 Check the repeatability.
The alarm occurs occasionally after
operation is started.
Investigate item 5.
{ {
The connector is disconnected (or
loose).
Correctly install. 2 Check whether the drive unit
connectors (servo: CN3, spindle:
CN6) or detector connectors are
disconnected.
The connector is not disconnected. Investigate item 3.
{ {
The cable is broken. Replace the cable. 3 Using a tester, check whether the
detector cable is broken.
The cable is not broken. Servo : Investigate item 4.
Spindle : Investigate item 12.
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SV034/bit2 = 0 Set SP034/bit2 to 1. 4 When using MDS-B-HR, is the motor
thermal validated even when it is not
provided?
SV034/bit2 = 1 Investigate item 12.
{
The load is large. Servo : Investigate item 6.
Spindle : Investigate item 8.
5 Check the overload % (servo) or load
meter (spindle).
The load is not large. Investigate item 9.
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The constant load torque (friction +
unbalance) is 60% or more.
Select the motor so that the constant
load torque is 60% or less.
6 Is the unbalance torque high?
The constant load torque is less than
60%.
Investigate item 7.
{
The alarm was forcibly reset. Do not turn the drive unit's power
OFF when an overload alarm occurs.
(The NC power can be turned OFF.)
7 Was the overload alarm (50) forcibly
reset by turning the drive unit power
OFF?
The alarm was not forcibly reset. Investigate item 9.
{
There was an incorrect setting. Correctl y set. 8 Check the parameter settings.
The settings are correct. Investigate item 9.
{
Hot. Investigate item 10. 9 Measure the motor temperature
when the alarm occurs.
Not hot. Investigate item 12.
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The fan motor was stopped. Investigate item 11.
The motor fan wind flow is poor. Clean.
10 When using a motor with fan, check
whether the fan is stopped, or
whether it is clogged with dust, etc.
There is no problem. Investigate item 12.
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The cable is broken. Replace the cable. 11 Check the fan wiring.
The cable is not broken. Replace the fan.
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Improved. Replace the drive unit. 12 Try replacing the drive unit.
Not improved. Replace the motor.
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Alarm No.
4E
NC command mode error
A spindle control mode selection outside the specifications was input.
Investigation details Investigation results Remedies SV SP
The alarm always occurs at the same
position.
Check the NC and PLC program
process.
1 Pinpoint where the alarm occurs in
the PLC program.
The alarm occurs irregularly. Investigate item 2.
{
The alarm occurs during position
control.
Check the NC and PLC program
process.
2 Does the alarm occur when position
control (C-axis, spindle
synchronization, synchronous tap) is
started?
The alarm occurs during speed
control.
Check the NC and PLC program
process.
(If the cause cannot be pinpointed,
replace the drive unit, and confirm.)
{
6. Troubleshooting
6 - 26
Alarm No.
50
Overload 1
The overload detection level reached 100% or more. The motor or drive unit is in the overload state.
Investigation details Investigation results Remedies SV SP
The standard values (below) are not
set.
Servo : SV021 = 60, SV022 = 150
Spindle : SV063 = 60, SP064 = 110
Set the standard values.
1 Check the overload parameters.
Servo : SV021, SV022
Spindle : SP063, SP064
The standard values are set. Investigate item 2.
{ {
The load is large. Servo : Investigate item 3.
Spindle : Investigate item 7.
2 Check the overload % (servo) or load
meter (spindle).
The load is not large. Investigate item 9.
{ {
Resonance is occurring. Adjust the parameters.
• Set the notch filter.
• Lower VGN1 (SV005).
3 Check whether machine resonance is
occurring.
Resonance is not occurring. Investigate item 4.
{
The motor is hunting. Adjust the parameters.
• Increase VGN1 (SV005).
• Lower VIA (SV008).
4 Check whether the shaft sways when
the motor is stopped. (Hunting)
The motor is not hunting. Investigate item 5.
{
The motor brakes are not released. Correct the faulty section. 5 Check the brake operation
Check the brake relay.
Check the connector (CN20)
connection.
The motor brake operation is normal. Investigate item 6.
{
The cutting load is large. Lower the cutting load.
There is interference with the
positioning pin.
When using the positioning pin, turn
the servo OFF when stopped.
An excessive force is applied from
the machine.
Check whether the ball screw is bent,
or whether there is a fault in the
guide.
6 Check the load current with the NC
Servo Monitor, and investigate the
machine load.
The machine load is not large. Investigate item 8.
{
There is a problem. Adjust the PLG output waveform. 7 Check the PLG output waveform.
Normal Investigate item 8.
{
The motor performance is
insufficient.
Lower the acceleration/deceleration
rate or cutting load.
8 Confirm the motor capacity selection
again.
The motor performance is sufficient. Investigate item 9.
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Improved. Replace the drive unit. 9 Try replacing the drive unit.
Not improved. Replace the motor.
{ {
(Note) NR and PR resetting are not possible when the overload level is 50% or more. Do not forcibly reset (AR) by turning the unit
power OFF. If AR resetting is used at 50% or higher, the level is set to 80% when the power is turned ON next. (Servo)
6. Troubleshooting
6 - 27
Alarm No.
51
Overload 2
With the servo, a current command exceeding 95% of the unit's maximum current continued for one
second or more. With the spindle, a load exceeding the continuous rating continued for 30 minutes or
more.
Investigation details Investigation results Remedies SV SP
The alarm occurred after ready ON
before operation starts.
Investigate item 2. 1 Did the alarm occur immediately after
READY ON?
The alarm occurred after normal
operation.
Investigate item 5.
{
The voltage is not supplied. Correctly supply the PN voltage. 2 Check that the PN voltage is supplied
to the drive unit.
Is the CHARGE lamp ON?
Approx. 300V is correctly supplied. Investigate item 3.
{
The connections are incorrect. Connect correctly. 3 Check the motor power cable (U, V,
W phases).
The power cable is not connected.
Is the cable connected to the motor
for another axis?
The connections are correct. Investigate item 4.
{
The connections are incorrect. Connect correctly. 4 Check the detector cable connection.
Is the cable connected to the motor
for another axis?
The connections are correct. Investigate item 5.
{
The machine has collided. Check the machining program and
soft limit settings.
5 Check whether the machine has
collided.
The machine has not collided. Investigate item 6.
{
The current is saturated during
acceleration/deceleration.
Increase the acceleration/
deceleration time constant.
6 Check whether the current value on
the NC Servo Monitor screen is
saturated during
acceleration/deceleration.
The current value during
acceleration/deceleration is
appropriate.
Investigate item 7.
{
The FB signal is abnormal. Replace the detector.
(With the absolute position system,
the zero point must be established.)
7 Check the detector FB.
The FB signal is normal. Replace the drive unit.
{
The load is large. Lower the load. 8 Check the load meter value.
The load is not large. Investigate item 9.
{
There is a problem. Adjust the PLG output waveform. 9 Check the PLG output waveform.
Normal Replace the drive unit.
{
Alarm No.
52
Excessive error 1
The difference between the motor's actual position at servo ON and the theoretical position exceeded
the setting value.
Investigation details Investigation results Remedies SV SP
The excessive error detection width is
too small.
Servo standard value:
SV023 =
RAPID
60
×
PGN1
÷ 2
For the spindle, a value larger than
the droop amount:
Droop amount =
Spindle rotation speed
×
No. of pulses
60
×
position loop gain
Set appropriate values. 1 Check the excessive error detection
width.
SV023 (Servo)
SP102 (Orientation control)
SP154, SP155 (C-axis control)
SP177/bitD, SP186 (Spindle
synchronous control)
SP193/bitD, SP218 (Synchronous
tap)
Appropriate values are set. Investigate item 2.
{ {
The polarity is reversed. Correctly set the parameters. 2 Check the position detector polarity.
SV017/bit4 (Servo)
SP097/bit5 (Orientation control)
SP129/bit5 (C-axis control)
SP177/bit5 (Spindle synchronous
control)
SP193/bit5 (Synchronous tap
control)
Normal. Investigate item 3.
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3 Check the alarm No. "51" items.
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